Chess Stalker — Free Chess Opponent Analysis

Analyze any Lichess, Chess.com or FIDE player's openings, weaknesses, blunder patterns and psychological profile. Train against a Twin Bot that replicates your opponent's style. Search by username or FIDE ID across 11 million+ games. Free to use, no signup required.

What you get

Opponent weakness analysis — opening repertoire, common blunders, time pressure patterns
Twin Bot — practice against an AI clone of your opponent's exact playing style
FIDE OTB database — 11 million+ tournament games and 1.7 million+ rated players
Stockfish-powered analysis with depth-25 evaluations
Multi-platform: Lichess, Chess.com, and FIDE in one place
Head-to-head comparison, Nemesis detection, Stalker Score

How it works

Search any Lichess, Chess.com username or FIDE player
Get instant scouting report with weaknesses and patterns
Prepare your strategy and practice against the Twin Bot

IM

Ilinca, Felix-Antonio

ROU ROU·Born 2010·FIDE #54764998·1,276 Games

Classical24951,258 Games

Rapid24027 Games

Blitz245211 Games

Statistics

1276

Total

694

Wins

226

Draws

356

Losses

54%18%28%

Play Style

What you need to know before facing them

Elite accuracy: 92.8% average

Solid conversion: 82%

Very consistent (88%)

Very precise: only 0.1 blunders/game

Dominates 1.h3 ♔ (77% in 11 games)

Deep Analysis

Stockfish 18 · Classical games · 357 analyzed

Accuracy by phase

Opening96.5%

Middlegame93.5%

Endgame94.8%

Clutch Factor

Performance under pressure

+5%

Winning (+2 or more)94%

164 Games

Equal position94%

107 Games

Losing (-2 or more)89%

86 Games

Problematic Pieces

Which pieces cause most errors?

♖

25%

91 errors

♙

19%

71 errors

♕

18%

66 errors

♔

15%

54 errors

♗

13%

47 errors

♞

11%

39 errors

Critical Moment

When does the first serious error occur?

Move 45average

1-15

16-25

26-35

36-45

46+

43% of blunders occur between move 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

12

13

10

16

12

10

10

14

10

9

abcdefgh

Many

Few

Critical squares

e516 err

e414 err

g613 err

f612 err

g512 err

e5/e4 concentrate most errors. Force decisions in those zones.

Recent Games

L

Rogov, Matfey2380

2nd 3-0 Thu 28th May 2026 · 28 May 2026

0-1

W

Asish Panda1942

2nd 3-0 Thu 28th May 2026 · 28 May 2026

0-1

L

Tanenbaum, Zachary2299

2nd 3-0 Thu 28th May 2026 · 28 May 2026

0-1

L

Lazavik, Denis2621

2nd 3-0 Thu 28th May 2026 · 28 May 2026

1-0

L

Maghsoodloo, Parham2710

1st 3-0 Thu 28th May 2026 · 28 May 2026

0-1

W

Martinez Ramirez, Lennis2395

2nd 3-0 Thu 28th May 2026 · 28 May 2026

0-1

Openings

Based on player games

Weaknesses

EXPLOIT!

White

King's Indian: Classical

50.0%

10 Games·Loses

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2

Sicilian: Najdorf

44.4%

18 Games·Loses

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6

Black

No significant weaknesses detected as Black

Strengths

AVOID

White

Queen's Gambit Accepted

80.0%

10 Games·Wins

1.d4 d5 2.c4 dxc4

Italian: Two Knights

75.0%

12 Games·Wins

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6

Black

Caro-Kann: Main Line

70.0%

20 Games·Wins

1.e4 c6 2.d4 d5 3.Nc3 dxe4

Sicilian: d6 Systems

63.3%

60 Games·Wins

1.e4 c5 2.Nf3 d6

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#38a3??

Tactics

vs Palomo Monserrat

OTB·2026

▶

#50Kc4??

Endgame

vs Bernadskiy

OTB·2025

▶

#18Qd3??

Tactics

vs Sliwicka

OTB·2025

▶

#24Nxf4??

Tactics

vs Shirliyev

Blitz·2025

▶

#20Rb8??

Tactics

vs Bagwe Gaurang

Blitz·2025

▶

#75Ne5??

Endgame

vs Yang

Blitz·2025

▶

#22Bd3??

Tactics

vs Soud

Blitz·2025

▶

#43Rd3??

Endgame

vs Hamidov

Blitz·2025

▶

#69Qb5??

Endgame

vs Krishna Teja

OTB·2025

▶

#37Bxb1??

Tactics

vs Andreasyan

OTB·2025

Endgame Statistics

22 endgame categories analyzed — discover where they collapse under pressure

Repertoire

☰ All

♟ Classical

⚡ Rapid

🔥 Blitz

PRO

·

2026

2025

2024

2023

2022

101

PRO

8

7

6

5

4

3

2

1a

b

c

d

e

f

g

h

Starting Position

656 Games

57%18%25%

Move	Games	Performance	%
1.d4	410		69%
1.e4	153		59%
1.Nf3 Strong	33		73%
1.c4	29		50%
1.g3	13		69%
1.h3 Strong	11		77%
1.b3	7		57%

1.d4

69%

410

1.e4

59%

153

1.Nf3

73%

33

1.c4

50%

29

1.g3

69%

13

1.h3

77%

11

1.b3

57%

7

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